Some ideas for a sequel
Alright, hey dude, here's what's up.
Loved a lot of the game. Especially the map because if you can't find one you can see where you haven't explored or if you saw a gem but weren't able to pick it up.
My problem with it is that the only motivation you have to continue playing is to find more gems. What would be really cool is if each gem gave you something. I'm sort of thinking Zeldaian here, like maybe there are 5 different areas on this planet, like a forest, desert, ocean, etc. and in each zone you must find 10 gems and 1 item like a jetpack which allows temporary hovering, or the scuba suit needed to do the ocean level.
As it is, I don't think there is enough variety and there is no reward for collecting each gem, which would make continuing much more compelling.
But loved it overall! Good luck in the future!